﻿package java;

public class mianji {
	String xingzhuang;
	int bianchang;
	int gao;
	int banjing;
	double pai;
	public double showSanjiaoxing(){
		return (bianchang*gao)/2;
	}
	public double showZhengfangxing(){
		return bianchang*2;
	}
	public double showYuan(){
		return pai*(banjing*banjing);
	}
}
